Method of manufacturing tires



Jufiy 31, 1923. 1 4 337541 G E. RETT METHOD OF MANUFACTURING TIRES Filed Sept. 9, 1922 2 Sheets-Sheet 2 I? iNVENTOR Q /fi 2 26:77?

CARL E. RETT, F AKRON, CHI), ASSIGHOR TO LAMBERT TIRE'& RUBBER GO., OF

I BAEBEBTON, OHIO, A CORYOBATIQN DE ARIZONA.

BEETHOD OF'MANUFACTUBING TIRES.

zlp'plioation moi fisptcmbex' e, 1922. semi II. ss'm-ii.

To all whom it may concern: I lie it known that I, CARL E. RETT, a citizcn of the United tltatcs,'residing at Akron, in the county of Summit and State of Ohio, have invc'nted a certain new and Improved Method of Manufacturing Tires, of which the following is a specification.

This invention relates to the art of tir,

building, and cspeciall for that branch of the art which has to o with the manufacture of cushion tires and more particularly venl ed cushion tires. l'leretofore in the manufacture of tires of lhe type to which the prcscnt invontion psrticulzirl relates each different style of rizn require a different mold to he used in forming and vulcaniziiig the lire. asthe mold had to fit the run zind dillcienl shaped rims msdedillcrent molds necessary. This required a large stock s to beprovided by the tire builder; whcrsiorc lhc present invention has'for so ob lcc'l to provide a method'of building tiios by moans oil which only one mold nocd loo used in which the tircesrcass may he blillll regardless of the rim on which iii is to placed, ihus saving s large investment in molds as Well as stsndsrdizin the tire regsi-dlcss of. the rim on ivhic fit to be plscsdJ I Gcncricolly, in carrying out the invention, any rim that is to be, supplied with a cushion lire is provided Willi s tire base that is built up on the rim in such manner that the periphoi the tire hsse approximates the standard cross sections-l shops and sizeof lhot poo tior of the tics oody which is to be attached he lJzlSGglllG body of the is separately up to a standard. si and the boss portion in the rim and "1H8 body arc separa ly portly cured. or vulcanized slicer which the body portion of the tire tched over the llflSU portion on thc rini; as carcass is then Wrappcd'snd the and body portions vulcanized together into unitary mass.

More specifically inv ion. includes those novel stops and open oons in tire building which will hereinafter he described, then lac specificallv pointed. out in-the sppenilcd claims, me being had to the sccom iisnying d1 .u in which:

Figure 1 is oi sectional of a rim on which 41 anslanilt up.

perspective. View hion tire is to so Figure 2 is a cross section of the rim shoW-. my: the cement. cost applied.

Figure 3 is cross section of the rim after the base material is built up to the required I (lcpth and dimensions.

Figure 4 is a view similar to Figure 3 showing the rim and base material wrapped ready for partial vulcanization.

Figure 5 is cross section of amold and tire body built up in the same ready for partial vulcanization.

Fig-wire 6 is a sectional ers active View i of the tire body after partial vulcanization and removal from the mold.

Figure l is a detail sectional perspective view of the rimand base portion of the tire after the same has been partially curediand .the peripheral surface of the base, portion of a portion of the rim base section and body section of the tirewrspped ready for final vulcaninsiion.

Flgll'if 11 is a detail sectional perspective view of a portion of the complete tire often removal of 'lhe Wrapping and extraction of the core pipcs.

In the drawings in which like. numerals.-

of reference indicate like parts in all ofthe figures, 1 represents the rim, the cross sectional. form of which may he of any of the standard. types. In buildingup tires by this process, it is only necessary to provido one body mold in Which-the body porlion of the tire is built up e. one mold for each size of tire).

In carrying out his invention, the rim' 1 has its surface 2' cross plated and then covcred with a, layer of rubber cement 3. The tire builder than louildsup in the rim a base structure 4 sufficient tofill the rind to the desired extent and provide the required pe rlpheral surface of the cross sectional form and dimensions to receive the stsndard body portion of the tire. The rim and its built up tire base portion 4 are then wrapped all 5 and 6 in the usual way with canvas and placed in a vulcanizing chamber and partially cured, after which the'wrapping is removed and the rirm with the tire base is ready to receive the partially cured body portion of the tire.

The body portion of the tire is builtup in a mold 8 having a base configuration of standardized form at 7, in the usual way. These molds 8 may be of the kind disclosed in Letters Patent No. 1,386,513 issued to Henrv M. Lambert August 2, 1921, or Letters Patent No. 1,399,128 issued to Henry M. Lambert December 6, 1921, or Letters Patent No. 1,386,512 issued to Henry M.' Lambert August 2, 1921, or any other suit;

ing the core pins inthe body portion of the tire.

The surface f the base portion and body portion of the tire which are designed to fit together, are preferably roughened, as at 13, and painted with a rubber cement,

after which the body portion is stretched over the base portion and the bled as shown in Figure 9.

parts assem- The entire structure is then wrapped in canvas, as at 12, and vulcanized according t0 the usual wrapping process, following which the wrapping is removed and the 'core pins 10 are pressed out leaving the tire in the completed state shown in Figure 11.

By making the configuration of the surface 7 of the mold of a standard dimension and cross sectional form for each size of tires, only one set of molds for each size of tire isrcquired. For instance if the tire maker is building four inch tires, he will have one mold for a four inch size and, by

this process, he would take any'of the,

standard rims which four inch tires are supposed to fit and by building up the base structure in the manner described, he can adapt any rim to take the standard body portion of the tire, thus making' it unnecessary to have a special mold for each difi'erent design of rim or size of tire.

From the foregoing description, taken in connection with the accompanying drawings, it is thought the method will be clear to those skilled in the art to which it a ppertains.

The i What I claim is:

l. The method of tire building which consists in taking a rim of any usual cross sec tional shape, building up a tire base in the rim and'partially curing the same; building up a tire body separately from the rim base and partially curing the same; subsequently stretching thetire body and placing it over the base portion on the rim; then vulcanizing the whole together.

2. In a method of tire building the steps which comprise taking a rim and covering its periphery with rubber cement and building up on the rim a tire base structure and partially curing the same.

3. In a method of tire building, the steps which comprise building up a tire bodyportion without a base or rim engaging por tion and partially curing the same.

4. The method of tire building which consists in taking a rim having a surface possessing an atlinity for rubber, covering the surface with rubber cement and building in the rim a tire base structure, then partially curing the same; taking a mold and building up a tire body portion in the mold and partially curing the same; removing the body portion from the mold and stretching it over the base portion in the rim and finally vulcanizing the mass in aunitary structure.

The method of tire building which con sists in taking a rim of any usual cross sec tional form and building up a base struc ture in the rim, the peripheral surface of which is of a definite and predetermined dimension, wrapping the same and partially curing it, then unwrapping the partially cured mass; building up a body portion sep arate from the base in a mold having core pins, partially vulcanizing the body portion while in the mold, then removing the mold while leaving the core pins in the body portion, stretching the body port-ion and placing it over the base portion and vulcanizing the body and base portions together in a unitary structure and then removing the core ins. I

6. The method of tire building which consists in building up a body portion havin; an inner annular surface of predetermined size and cross sectional form and partially vulc-anizing the same; building up a base portion in a tire rim, making the periphery of said base portion accord with the inner annular surface of the body portion,

partially vulcanizing the base portion and then stretching the body portion over and fitting it onto the base portion'a-nd subse quently vulcanizing the mass to unite the base and body portions and complete the @ARL E. RETT.

act of vulcanization. 

